CN109819333A - Video stream code rate allocation method and device and computer readable storage medium - Google Patents
Video stream code rate allocation method and device and computer readable storage medium Download PDFInfo
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- CN109819333A CN109819333A CN201910025892.3A CN201910025892A CN109819333A CN 109819333 A CN109819333 A CN 109819333A CN 201910025892 A CN201910025892 A CN 201910025892A CN 109819333 A CN109819333 A CN 109819333A
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- 238000009826 distribution Methods 0.000 claims description 36
- 238000004590 computer program Methods 0.000 claims description 22
- 239000002699 waste material Substances 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/437—Interfacing the upstream path of the transmission network, e.g. for transmitting client requests to a VOD server
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
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- Engineering & Computer Science (AREA)
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a video stream code rate allocation method, a device and a computer readable storage medium, wherein the method comprises the following steps: receiving subscription information from a receiving terminal; wherein the subscription information comprises a resolution of a subscription video stream; acquiring a current uplink code rate; determining the resolution and the corresponding code rate of a video stream to be sent according to the subscription information and the uplink code rate; and sending the video stream to be sent to the receiving end according to the determined code rate. The invention is beneficial to reducing the encoding burden of the video source end and avoiding the waste of uplink bandwidth resources.
Description
Technical field
The present invention relates to fields of communication technology more particularly to a kind of video flowing code rate allocation method, device and computer can
Read storage medium.
Background technique
Source video generally requires the video flowing for supporting to send multichannel when carrying out multicast, such as sends resolution ratio and be
The video flowing of 180p, 360p, 720p and 1080p.Inventor has found that at least there are the following problems when implementing the prior art: if
The multi-channel video of support is all sent to server by default source, and receiving end obtains corresponding view from server further according to demand
Frequency flows, and on the one hand will increase the coding burden of source in this way, on the other hand every road video flowing is sent to server termination from source
It receives, the process that source is sent can occupy the upstream bandwidth of source, and the received process of server can occupy the downlink band of server end
Width, the video flowing of non-demand can occupy the bandwidth of source and server end, cause the waste of bandwidth resources.
Summary of the invention
The object of the present invention is to provide a kind of video flowing code rate allocation method, device and computer readable storage mediums, have
It is born conducive to video source coding is reduced, and avoids the waste of uplink bandwidth resource.
In order to solve the above technical problem, the present invention provides a kind of video flowing code rate allocation methods, comprising:
Receive the subscription information from receiving end；Wherein, the subscription information includes subscribing to the resolution ratio of video flowing；
Obtain current uplink code rate；
According to the subscription information and the uplink code rate, determine video flowing to be sent resolution ratio and corresponding code rate；
According to fixed code rate, the video stream to be sent is given to the receiving end.
A kind of video flowing code rate allocation method provided in an embodiment of the present invention can be requested and be sent out according to the subscription of receiving end
The uplink code rate of sending end itself determines the resolution ratio for currently needing to be sent to the video flowing of receiving end, and the code that distribution adapts to
Rate to need to only generate the video flowing to be sent of required resolution ratio, and sends video flowing according to determining code rate, meets and receive
While the subscription demand at end, solves the video flowing for needing to generate and send all resolution ratio in the prior art, to drop
Low video source coding burden, avoids the waste of uplink bandwidth resource.
Further, the receiving end includes several, then the resolution ratio of determination video flowing to be sent includes:
It determines several resolution ratio of video flowing to be sent and distributes to the code rate of the video flowing to be sent of each resolution ratio.
As further scheme, the present invention is requested according to the subscription of different receiving ends and the uplink code rate of transmitting terminal itself,
Reasonable video flowing is distributed for different receiving ends, to avoid uplink while the subscription demand for meeting receiving end
The waste of code rate.
Further, several resolution ratio of determination video flowing to be sent and the view to be sent for distributing to each resolution ratio
The code rate of frequency stream specifically includes:
According to the subscription information and the uplink code rate, and based on minimum needed for the video flowing for sending each resolution ratio
Code rate, target bit rate and highest code rate determine several resolution ratio of video flowing to be sent and distribute to the pending of each resolution ratio
Send the code rate of video flowing.
As further scheme, it is contemplated that lowest bit rate needed for the video flowing of different resolution, target bit rate and highest
Code rate can to determine the resolution ratio and the code rate for the video flowing to be sent for distributing to each resolution ratio of several video flowings to be sent
To realize the lowest bit rate for guaranteeing video flowing to be sent, at the same can also according to lowest bit rate, target bit rate and highest code rate come
Realize the reasonable distribution of the code rate of video flowing to be sent.
Further, several resolution ratio of determination video flowing to be sent specifically include:
According to the demand of the resolution ratio of the video flowing of each receiving end subscription, and to meet several resolutions to be determined
The lowest bit rate of the video flowing to be sent of rate is target, determines that several resolution ratio that the uplink code rate can be supported are made
For the resolution ratio of the video flowing to be sent.
Further, the resolution ratio that the determination uplink code rate can be supported is as the video flowing to be sent
Resolution ratio includes:
According to sequence from low to high, each resolution ratio for subscribing to video flowing in the subscription information is successively chosen, and
For the resolution ratio of the subscription video flowing of each selection, the minimum code of the resolution ratio for the subscription video flowing chosen is judged
Whether rate is not more than the code rate of the uplink code rate current residual, if so, the resolution ratio to pull subscription by the selection is true
It is set to subscription layer to be sent, if it is not, then in resolution ratio of the numerical value lower than the subscription video flowing resolution ratio chosen, by lowest bit rate
Meet resolution ratio of the highest resolution of the code rate of the uplink code rate current residual as the video flowing to be sent.
Further, the code rate of the video flowing to be sent for distributing to each resolution ratio specifically includes:
To the video flowing distribution lowest bit rate to be sent of each resolution ratio；
The uplink code rate, which is obtained, to remaining code rate after the video flowing distribution lowest bit rate to be sent of each resolution ratio is
Described first remaining code rate；
If the described first remaining code rate is greater than zero, using the target bit rate for meeting the video flowing to be sent as target, press
The described first remaining code rate is successively given to each video flowing distribution code rate to be sent according to preset order；
It obtains after the described first remaining code rate is allocated using to meet the target bit rate of the video flowing to be sent as target
Remaining code rate is the second remaining code rate；
If the described second remaining code rate is greater than zero, using the highest code rate for meeting the video flowing to be sent as target, press
Described second remaining code rate is successively given to the video flowing distribution code rate to be sent of each resolution ratio according to preset order.
Further, the resolution ratio that the determination uplink code rate can be supported is as the video flowing to be sent
Resolution ratio and to each resolution ratio distribution lowest bit rate to be sent include:
S311, judge whether successively to choose according to the sequence of resolution ratio from low to high it is each in the subscription information
Resolution ratio, if so, the S316 that gos to step, if it is not, then going to step S312；
S312, the sequence according to resolution ratio from low to high select next subscription video flowing from the subscription information
Resolution ratio is as current resolution；
S313, judge whether the current resolution has distributed lowest bit rate, if so, return step S311, if it is not, then
Go to step S314；
S314, judge whether the remaining code rate of the uplink code rate is not less than the lowest bit rate of the current resolution,
If so, determining that the current resolution is the resolution ratio of the video flowing to be sent, and distribute to the current resolution pair
The lowest bit rate answered, while the remaining code rate of the uplink code rate is updated, and the S311 that gos to step；If it is not, then going to step
Rapid S315；
S315, judgement support the next resolution for being lower than the current resolution in the resolution ratio sent with the presence or absence of resolution ratio
Rate, if so, the next layer of resolution ratio will be chosen as current resolution and execute step S313, if it is not, then going to step
S316；
S316, terminate resolution ratio that the determination uplink code rate can be supported as the resolution to be sent
Rate, and lowest bit rate is distributed to the resolution ratio of each video flowing to be sent.
Further, the target bit rate to meet the resolution ratio to be sent is target, according to resolution ratio from height
It successively gives the resolution ratio of each video flowing to be sent to distribute code rate the described first remaining code rate to low sequence to include:
S341, judge whether successively to choose the described to be sent of all determinations according to the sequence of resolution ratio from high to low
The resolution ratio of video flowing, if so, step S334 is gone to, if it is not, then going to step S342；
S342, the sequence according to resolution ratio from high to low, from the resolution ratio of the video flowing to be sent of all determinations
Select next current resolution ratio to be sent；
S343, judge the described first code rate of remaining code rate current residual and having divided for the current resolution ratio to be sent
The lowest bit rate being fitted on and whether be greater than the target bit rate of the current resolution ratio to be sent, if so, by described first
Demal rate distributes to the current resolution ratio to be sent in the middle part of remaining code rate, so that the current resolution ratio distribution to be sent
Code rate reach target bit rate, update the code rate of the described first remaining code rate current residual, and go to step S341；If it is not, then
By the resolution ratio for being fully allocated to the current video flowing to be sent of the code rate of the described first remaining code rate current residual, update
The code rate of described first remaining code rate current residual, and go to step S334；
S334, terminate the target bit rate to meet the resolution ratio of the video flowing to be sent as target, according to resolution
Described first remaining code rate is successively given each resolution ratio to be sent to distribute code rate by the sequence of rate from high to low.
Further, the highest code rate to meet the resolution ratio of the video flowing to be sent is target, according to resolution
Described second remaining code rate is successively given the resolution ratio of each video flowing to be sent to distribute code rate by the sequence of rate from high to low
Include:
S361, judge whether successively to choose the described to be sent of all determinations according to the sequence of resolution ratio from high to low
The resolution ratio of video flowing, if so, step S364 is gone to, if it is not, then going to step S362；
S362, the sequence according to resolution ratio from high to low, from the resolution ratio of determining all video flowings to be sent
Select the resolution ratio of next current video flowing to be sent；
The resolution ratio of S363, the code rate for judging the described first remaining code rate current residual and the current video flowing to be sent
The code rate being currently assigned to and whether be greater than the maximal rate of the current resolution ratio to be sent, if so, will be described
Demal rate distributes to the current resolution ratio to be sent in the middle part of second remaining code rate, so that the current video flowing to be sent
The code rate of resolution ratio distribution reaches maximal rate, updates the code rate of the described second remaining code rate current residual, and goes to step
S361；If it is not, the code rate of the described second remaining code rate current residual is then fully allocated to the current resolution to be sent
Rate；
S364, terminate the highest code rate to meet the resolution ratio of the video flowing to be sent as target, according to resolution
Described second remaining code rate is successively given each resolution ratio to be sent to distribute code rate by the sequence of rate from high to low.
Further, described receive includes: from receiving end subscription information
Receive the subscription information for several receiving ends summarized and forwarded by server；
Then include: to the receiving end by the video stream to be sent
The video stream to be sent is given to the server, so that the server is by the to be sent of each resolution ratio
Video stream gives corresponding receiving end.
Correspondingly, the embodiment of the present invention also provides a kind of video flowing Data Rate Distribution device, including processor, memory and
The computer program executed by the processor is stored in the memory and is configured as, the processor executes the meter
Video flowing code rate allocation method as described above is realized when calculation machine program.
Correspondingly, the embodiment of the present invention also provides a kind of computer readable storage medium, the computer-readable storage medium
Matter includes the computer program of storage, wherein controls the computer readable storage medium in computer program operation
Place equipment executes video flowing code rate allocation method as described above.
Detailed description of the invention
Fig. 1 is the flow chart of the video flowing code rate allocation method in the embodiment of the present invention；
Fig. 2 is the timing diagram of the video flowing code rate allocation method in the embodiment of the present invention；
Fig. 3 is the flow chart of the step S3 in the embodiment of the present invention；
Fig. 4 is the practical application flow chart of the step S31 in the embodiment of the present invention；
Fig. 5 is the practical application flow chart of the step S33 in the embodiment of the present invention；
Fig. 6 is the practical application flow chart of the step S35 in the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
As shown in Figure 1, the video flowing code rate allocation method that the preferred embodiment of the present invention 1 provides, the present embodiment includes following
Step:
S1, the subscription information from receiving end is received；Wherein, the subscription information includes subscribing to the resolution ratio of video flowing；
S2, current uplink code rate is obtained；
S3, according to the subscription information and the uplink code rate, determine video flowing to be sent resolution ratio and corresponding code
Rate；
S4, according to fixed code rate, give the video stream to be sent to the receiving end.
A kind of video flowing code rate allocation method provided in an embodiment of the present invention can be requested and be sent out according to the subscription of receiving end
The uplink code rate of sending end itself determines the resolution ratio for currently needing to be sent to the video flowing of receiving end, and the code that distribution adapts to
Rate to need to only generate the video flowing to be sent of required resolution ratio, and sends video flowing according to determining code rate, meets and receive
While the subscription demand at end, solves the video flowing for needing to generate and send all resolution ratio in the prior art, to drop
Low video source coding burden, avoids the waste of uplink bandwidth resource.
It is understood that the code rate of uplink code rate uploaded videos stream herein.Specifically, uplink code rate is preferably combined and is lost
Packet, delay, shake etc. are estimated and the code rate that obtains, is able to reflect the bandwidth conditions of uplink substantially.
Specifically, the receiving end includes several, then:
The statistical information of subscription request described in step S1 includes the resolution ratio that several receiving ends of statistics are pulled subscription
Information；
Determine that the resolution ratio of video flowing to be sent comprises determining that several resolution ratio of video flowing to be sent described in step S3
With the code rate for the video flowing to be sent for distributing to each resolution ratio.
The present invention can be according to the uplink code rate of the subscription request and transmitting terminal itself of receiving end, for different receiving end point
With reasonable video flowing, to avoid the waste of uplink code rate while the subscription demand for meeting receiving end.
In embodiments of the present invention, it is preferred that the resolution ratio that each receiving end is pulled subscription is each described connect
Receiving end can received highest resolution video flowing；In addition to this, the resolution ratio that each receiving end is pulled subscription is also
The resolution ratio that the needs that can be preferably provided with for user receive.
The present embodiment is suitable for transmitting terminal, which is at the source of video flowing, in the present invention also referred to as video source
End.Those skilled in the art are not it is understood that the resolution ratio that the video flowing of generation/request may be selected in transmitting terminal and receiving end is to appoint
Meaning value, but several fixed values, such as resolution ratio are the video flowing of 180p, 360p, 720p and 1080p.
It further, further include server in the working environment of the present embodiment, specifically, by server statistics from connecing
The information for the resolution ratio of receiving end to be pulled subscription, counts the information of the resolution ratio received, and statistical information is sent out
It send to transmitting terminal, to get the video flowing of corresponding resolution ratio；Then step S1 is specifically included:
S1, it receives and statistical information is requested by the subscription that the server is sent, wherein statistical information packet is requested in the subscription
Include the information of the resolution ratio to be pulled subscription by several receiving ends of server statistics；
Then step S4 specifically: by the video stream to be sent to server；When server receive it is described pending
It, will be several described to be sent according to the information for the resolution ratio that the receiving end is pulled subscription after the video flowing for the resolution ratio sent
The video flowing of resolution ratio be forwarded to corresponding receiving end.
As shown in Fig. 2, for example, in embodiments of the present invention, since server requests statistical information to the subscription of transmitting terminal
The Video stream information of the different desired highest resolutions in receiving end is usually counted.For example, the bandwidth of receiving end 1 can prop up
The video flowing of source 180P is held, is then pulled subscription the video of transmitting terminal 180P to server, the bandwidth of receiving end 2 can be supported
The video flowing of source 360P then pulls subscription the video flowing of source 360P to server.Server can count recipient 1 and connect
Then the subscription solicited message of debit 2 subscribes to the video flowing of 180P and 360P to transmitting terminal, transmitting terminal is according to the subscription of server
The case where requesting statistical information and itself uplink code rate, to the video flowing distribution code rate of each resolution ratio, if uplink code
Rate is sufficient, then can all distribute code rate to 180P and 360P, to send the video flowing of 180P and 360P, server meeting to server
The 180P of transmitting terminal is transmitted to receiving end 1,360P is transmitted to receiving end 2, to distinguish reasonable code rate for different receiving ends
Video flowing.If uplink code rate is not sufficient to support while sending the video flowing of 180P and 360P, then 180P is sent to server
Video flowing, thus to server send 180P video flowing to receiving end 1 and receiving end 2.
Further, step S3 is specifically included: according to the subscription information and the uplink code rate, and it is each based on sending
The determination of lowest bit rate needed for the video flowing of resolution ratio, target bit rate and highest code rate, determine several points of video flowing to be sent
The code rate of resolution and the video flowing to be sent for distributing to each resolution ratio.
Wherein, the video flowing for sending each resolution ratio, such as the video that resolution ratio is 180p, 360p, 720p and 1080p
Stream, is preset with corresponding lowest bit rate, target bit rate and highest code rate；The lowest bit rate is the resolution ratio to be sent
Required lowest bit rate, the target bit rate are the desired ideal code rate of the resolution ratio to be sent, the maximum code
Rate by the resolution ratio to be sent the received maximal rate of energy.
Determine that several resolution ratio of video flowing to be sent specifically include in step S3:
The demand of the resolution ratio of S31, the video flowing subscribed to according to each receiving end, and it is to be determined several to meet
The lowest bit rate of the video flowing to be sent of resolution ratio is target, determines several resolutions that the uplink code rate can be supported
Resolution ratio of the rate as the video flowing to be sent.
The resolution ratio that the determining uplink code rate can be supported in specific steps S31 is as the video flowing to be sent
Resolution ratio includes:
According to sequence from low to high, each resolution ratio for subscribing to video flowing in the subscription information is successively chosen, and
For the resolution ratio of the subscription video flowing of each selection, the minimum code of the resolution ratio for the subscription video flowing chosen is judged
Whether rate is not more than the code rate of the uplink code rate current residual, if so, the resolution ratio to pull subscription by the selection is true
It is set to subscription layer to be sent, if it is not, then in resolution ratio of the numerical value lower than the subscription video flowing resolution ratio chosen, by lowest bit rate
Meet resolution ratio of the highest resolution of the code rate of the uplink code rate current residual as the video flowing to be sent.
The code rate that the video flowing to be sent of each resolution ratio is distributed in step S3 specifically includes:
S32, lowest bit rate is distributed to each resolution ratio to be sent；
S33, the uplink code rate is obtained to remaining code rate after each resolution ratio distribution lowest bit rate to be sent
For the described first remaining code rate；
If S34, the first remaining code rate are greater than zero, to meet the target bit rate of the resolution ratio to be sent as mesh
Described first remaining code rate is successively given each resolution ratio to be sent to distribute code rate by mark according to preset order；
S35, obtain the described first remaining code rate be allocated using to meet the target bit rate of resolution ratio as target it is rear remaining
Code rate is the second remaining code rate；
If S36, the second remaining code rate are greater than zero, to meet the highest code rate of the resolution ratio to be sent as mesh
Described second remaining code rate is successively given each resolution ratio to be sent to distribute code rate by mark according to preset order.
Preferably, for the quality for guaranteeing high-resolution video flowing, presetting in the step S34 and step S36 is suitable
Sequence is the sequence of resolution ratio from high to low.
In order to give the reasonable lowest bit rate of video flowing distribution to be sent, the step S31 and S32 is specifically included:
S311, judge whether that successively choosing the subscription according to the sequence of resolution ratio from low to high requests statistical information
In each resolution ratio, if so, the S316 that gos to step, if it is not, then going to step S312；
It should be noted that initially since step S311, and defaulting from unselected when starting step S31 and S32 every time
Took the resolution ratio subscribed in request statistical information；
S312, the sequence according to resolution ratio from low to high select next request from subscription request statistical information
The resolution ratio of subscription is as current resolution；
S313, judge whether the current resolution has distributed lowest bit rate, if so, return step S311, if it is not, then
Go to step S314；
S314, judge whether the remaining code rate of the uplink code rate is not less than the lowest bit rate of the current resolution,
If so, determining that the current resolution is the resolution ratio to be sent, and it is corresponding most to distribute to the current resolution
Low bit- rate, while the remaining code rate of the uplink code rate is updated, and the S311 that gos to step；If it is not, then going to step S315；
S315, judging whether the resolution ratio for supporting to send, there are next resolutions that resolution ratio is lower than the current resolution
Rate, if so, next resolution ratio will be chosen as current resolution and execute step S313, if it is not, then going to step
S316；
It should be noted that the resolution ratio that support described in step S315 of the invention is sent is the video source/hair
The resolution ratio that can be sent in sending end, the resolution ratio of such as common offer 180p, 360p, 720p and 1080p.The step can guarantee
It, can be by selecting the video flowing of the resolution ratio of low layer to meet subscription demand when resolution ratio can not be sent when.
S316, terminate resolution ratio that the determination uplink code rate can be supported as the resolution to be sent
Rate, and lowest bit rate is distributed to each resolution ratio to be sent.
In embodiments of the present invention, the main purpose of the step S31 is to meet the resolution to be sent as far as possible
On the basis of the subscription demand of rate, confirm that the uplink code rate can support which resolution ratio subscribed to.Wherein, meet institute as far as possible
The principle for stating the subscription demand of resolution ratio to be sent is: the resolution ratio that the receiving end pulls subscription is considered first, if institute
The resolution ratio that uplink code rate can not support the receiving end to pull subscription is stated, then pays the utmost attention to what the receiving end pulled subscription
The layer of the low class resolution ratio of resolution ratio continues with the layer of a lower class resolution ratio, until lower if be still unable to satisfy
The layer of resolution ratio has been assigned code rate or the not layer of lower level.Moreover, it is judged which current uplink code rate supports differentiate
When rate, since the low resolution of subscription list, judge whether remaining code rate is more than or equal to the lowest bit rate of this layer, if full
Foot then gives the corresponding lowest bit rate of the Layer assignment, while updating remaining code rate, continues to traverse subscription list.If conditions are not met, then
Lower Layer assignment code rate is given on the basis of meeting subscription demand as far as possible.
In order to distribute reasonable target bit rate to the resolution ratio to be sent, preferentially to guarantee high-resolution video flowing hair
Video quality out, the step S34 are specifically included:
S341, judge whether successively to choose the described to be sent of all determinations according to the sequence of resolution ratio from high to low
Resolution ratio, if so, step S334 is gone to, if it is not, then going to step S342；
S342, the sequence according to resolution ratio from high to low are selected from the resolution ratio to be sent of all determinations
Next current resolution ratio to be sent；
S343, the code rate for judging the described first remaining code rate current residual and the current resolution ratio to be sent it is current
The code rate being assigned to and whether be greater than the target bit rate of the current resolution ratio to be sent, if so, described first is remained
Demal rate distributes to the current resolution ratio to be sent in the middle part of complementary rate, so that the current resolution ratio distribution to be sent
Code rate reaches target bit rate, updates the code rate of the described first remaining code rate current residual, and goes to step S341；If it is not, then will
The code rate of described first remaining code rate current residual is fully allocated to the current resolution ratio to be sent, updates described first
The code rate of remaining code rate current residual, and go to step S334；
S344, terminate the target bit rate to meet the resolution ratio to be sent as target, according to resolution ratio from height
Each resolution ratio to be sent is successively given to distribute code rate the described first remaining code rate to low sequence.
In order to distribute reasonable highest code rate to the resolution ratio to be sent, issued with preferentially guaranteeing that high-resolution subscribes to layer
Video quality, the step S36 includes:
S361, judge whether successively to choose the described to be sent of all determinations according to the sequence of resolution ratio from high to low
Resolution ratio, if so, step S364 is gone to, if it is not, then going to step S362；
S362, the sequence according to resolution ratio from high to low are selected from determining all resolution ratio to be sent
Next current resolution ratio to be sent；
S363, the code rate for judging the described first remaining code rate current residual and the current resolution ratio to be sent it is current
The code rate being assigned to and whether be greater than the maximal rate of the current resolution ratio to be sent, if so, described second is remained
Demal rate distributes to the current resolution ratio to be sent in the middle part of complementary rate, so that the current resolution ratio distribution to be sent
Code rate reaches maximal rate, updates the code rate of the described second remaining code rate current residual, and goes to step S361；If it is not, then will
The code rate of described second remaining code rate current residual is fully allocated to the current resolution ratio to be sent；
S364, terminate the highest code rate to meet the resolution ratio to be sent as target, according to resolution ratio from height
Each resolution ratio to be sent is successively given to distribute code rate the described second remaining code rate to low sequence.
To more fully understand above content, with the further explanation of following examples: referring to fig. 4~Fig. 6, as of the invention one
A practical application, it is assumed that resolution ratio includes: 180,360,720,1080；Assuming that the lowest bit rate of each resolution ratio, object code
Rate, highest code rate are provided that
// 180,360,720,1080
Constexpr uint32_t minBitrate [4]={ 30000,200000,600000,800000 }；// minimum
Code rate
Constexpr uint32_t targetBitrate [4]=100000,300000,1000000,
2000000}；// target bit rate
Constexpr uint32_t maxBitrate [4]={ 200000,700000,1800000,3000000 }；//
Highest code rate
Example 1: when server is to the video flowing of transmitting terminal subscription 180P, i.e. subscribeLayers=[180] is sent
The uplink code rate at end is bitrate=40k.
The first round:
SubscribeLayers is begun stepping through from low resolution, takes layer=180.Because of bitrate > minBitrate
[180], so isAllocated [layer]=true, i.e. resolution ratio 180P have enough Data Rate Distributions, resolution ratio 180P is true
It is set to the resolution ratio of video flowing to be sent, bitrateAllocate [layer]=minBitrate [180]=30k,
Bitrate=bitrate-minBitrate [180]=10k.Continue to traverse subscribeLayers, discovery traversal is completed, returned
It returns.Wherein, subscribeLayers indicates to subscribe to several resolution ratio in request, and bitrate indicates current uplink code rate.
Second wheel:
The resolution ratio that simulcast is supported is supportedLayers=[180,360,720], since high-resolution
SupportedLayers is traversed, when discovery only has layer=180, isAllocated [layer]=true then gives the layer
Distribute code rate.Due to bitrate+bitrateAllocated=10k+30k=40k, it is less than targetBitrate [layer]
=100k, then gives the code rate of Layer assignment 40k, and remaining code rate bitrate=0 is directly returned.Wherein, simulcast is supported
Resolution ratio indicate determined by video flowing to be sent resolution ratio.
Third round:
Bitrate=0 is directly returned.
Example 2: server subscribes to 180P+720P video, i.e. subscribeLayers=[180,720], hair to transmitting terminal
The uplink code rate of sending end is bitrate=600k.
The first round:
SubscribeLayers is begun stepping through from low resolution, takes layer=180 first.Because bitrate >
MinBitrate [180], so isAllocated [180]=true, bitrateAllocate [180]=30k, bitrate
=600k-30k=570k.
After distributing lowest bit rate for 180P resolution ratio, continues to traverse subscribeLayers, take layer=720.Because
Bitrate=570k < minBitrate [720]=600k, therefore Layer assignment code rate is not subscribed to 720P.Simultaneously judge exist than
720P low subscription layer lowerLayers=[180,360].
From high toward low traversal lowerLayers, lowerLayer=360 is taken, because of bitrate=570 > minBitrate
[360]=200k, thus give 360P distribute code rate, isAllocated [360]=true, bitrateAllocate [360]=
200k, bitrate=570k-200k=370k.It returns.
Second wheel:
The subscription layer that simulcast is supported is supportedLayers=[180,360,720,1080], from high-resolution
SupportedLayers is begun stepping through, 1080P subscribes to layer and 720P subscribes to the isAllocated of layer as false, directly skips.
Continue to traverse from high-resolution toward low resolution, when taking layer=360, finds isAllocated [360]=true, meanwhile,
Due to bitrateAllocate [360]+bitrate=570k > targetBitrate [360]=300k, to 360P points
With bitrateAllocate [360]=300k, remaining code rate bitrate=570k-300k=270k.
Continue to traverse, when taking layer=180P, finds isAllocated [180]=true, due to
BitrateAllocate [180]+bitrate=30k+270k=300k > targetBitrate [180]=100k, therefore give
180P subscribes to Layer assignment bitrateAllocated [180]=100k, remaining code rate bitrate=300k-100k=200k.
Continue, discovery traversal is completed, and is returned.
Third round:
The process for repeating the second wheel when taking layer=360P, finds isAllocated [360]=true, due to
BitrateAllocate [360]+bitrate=500k < maxBitrate [360]=700k, therefore Layer assignment is subscribed to 360P
BitrateAllocate [360]=500k, remaining code rate bitrate=0k.
Terminate, returns.
The merely illustrative explanation of data and program language that above-mentioned example is illustrated does not carry out protection scope of the present invention
Limitation.
A kind of example, the present embodiment can be adapted for more people's video conference scenes, and a participant is sending the scene of oneself
As transmitting terminal when video, other participants are then opposite to be used as receiving end, and receiving end and transmitting terminal are connected to same server,
Through this embodiment, receiving end can will subscribe to request and be sent to receiving end by server, receiving end according to subscribe to request with
The uplink code rate situation of itself determines that scene video needs to generate the video flowing of which resolution ratio, and the code rate being assigned to.
One embodiment of the invention 2 also provides a kind of video flowing Data Rate Distribution device, including processor, memory and storage
In the memory and it is configured as the computer program executed by the processor, the processor executes the computer
Video flowing code rate allocation method as described above is realized when program.
The video flowing Data Rate Distribution device of the embodiment includes: processor, memory and stores in the memory
And the computer program that can be run on the processor.The processor is realized above-mentioned each when executing the computer program
Step in video flowing code rate allocation method embodiment, such as step shown in FIG. 1.Alternatively, the processor executes the meter
The function of each module/unit in above-mentioned each Installation practice is realized when calculation machine program.
Illustratively, the computer program can be divided into one or more module/units, one or more
A module/unit is stored in the memory, and is executed by the processor, to complete the present invention.It is one or more
A module/unit can be the series of computation machine program instruction section that can complete specific function, and the instruction segment is for describing institute
Implementation procedure of the computer program in the video flowing Data Rate Distribution device is stated, such as:
Statistical information receiving unit subscribes to request statistical information for receiving；Wherein, statistical information packet is requested in the subscription
Include the information of the resolution ratio to be pulled subscription by several receiving ends of server statistics；
Uplink code rate acquiring unit, for obtaining current uplink code rate；
Resolution ratio determination unit to be sent, for requesting statistical information and the uplink code rate according to the subscription, really
Fixed resolution ratio to be sent and the code rate for distributing to each resolution ratio to be sent；
Transmission unit, for will be assigned the code rate the resolution ratio to be sent video stream to the clothes
Business device.
The video flowing Data Rate Distribution device can be desktop PC, notebook, palm PC and cloud server
Deng calculating equipment.The video flowing Data Rate Distribution device may include, but be not limited only to, processor, memory.Those skilled in the art
Member is appreciated that above description is only the example of video flowing Data Rate Distribution device, does not constitute and fills to video flowing Data Rate Distribution
The restriction set may include components more more or fewer than diagram, perhaps combine certain components or different components, such as
The video flowing Data Rate Distribution device can also include input-output equipment, network access equipment, bus etc..
Alleged processor can be central processing unit (Central Processing Unit, CPU), can also be it
His general processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng the processor is the control centre of the video flowing Data Rate Distribution device, is entirely regarded using various interfaces and connection
The various pieces of frequency stream bit rate distributor.
The memory can be used for storing the computer program and/or module, and the processor is by operation or executes
Computer program in the memory and/or module are stored, and calls the data being stored in memory, described in realization
The various functions of video flowing Data Rate Distribution device.The memory can mainly include storing program area and storage data area, wherein
Storing program area can application program needed for storage program area, at least one function (for example sound-playing function, image play
Function etc.) etc.；Storage data area, which can be stored, uses created data (such as audio data, phone directory etc.) according to mobile phone
Deng.It can also include nonvolatile memory in addition, memory may include high-speed random access memory, such as hard disk, interior
It deposits, plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card,
Flash card (Flash Card), at least one disk memory, flush memory device or other volatile solid-state parts.
Wherein, if the video flowing Data Rate Distribution device it is integrated module/unit it is real in the form of SFU software functional unit
Now and when sold or used as an independent product, it can store in a computer readable storage medium.Based in this way
Understanding, the present invention realize above-described embodiment method in all or part of the process, can also be instructed by computer program
Relevant hardware is completed, and the computer program can be stored in a computer readable storage medium, the computer program
When being executed by processor, it can be achieved that the step of above-mentioned each embodiment of the method.Wherein, the computer program includes computer
Program code, the computer program code can be source code form, object identification code form, executable file or certain centres
Form etc..The computer-readable medium may include: can carry the computer program code any entity or device,
Recording medium, USB flash disk, mobile hard disk, magnetic disk, CD, computer storage, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software
Distribution medium etc..It should be noted that the content that the computer-readable medium includes can be according to making laws in jurisdiction
Requirement with patent practice carries out increase and decrease appropriate, such as in certain jurisdictions, according to legislation and patent practice, computer
Readable medium does not include electric carrier signal and telecommunication signal.
In addition, in order to solve identical technical problem, the embodiment of the present invention 3 also provides a kind of computer-readable storage medium
Matter, the computer readable storage medium include the computer program of storage, wherein are controlled in computer program operation
Equipment executes video flowing code rate allocation method as described above where the computer readable storage medium.
To sum up, a kind of video flowing code rate allocation method, device and computer-readable storage medium provided in an embodiment of the present invention
Matter subscribes to request statistical information by receiving；Wherein, if the request statistical information of subscribing to includes the stem grafting by server statistics
The information for the resolution ratio that receiving end is pulled subscription；Obtain current uplink code rate；Statistical information and institute are requested according to the subscription
Uplink code rate is stated, determine resolution ratio to be sent and distributes to the code rate of each resolution ratio to be sent；It will distribute
The video stream of the resolution ratio to be sent of code rate is stated to the server.The present invention can be according to the subscription of receiving end
The uplink code rate of request and transmitting terminal itself distributes reasonable video flowing for different receiving ends, thus meeting receiving end
While subscription demand, the waste of uplink code rate is avoided.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as protection scope of the present invention.
Claims (12)
1. a kind of video flowing code rate allocation method characterized by comprising
Receive the subscription information from receiving end；Wherein, the subscription information includes subscribing to the resolution ratio of video flowing；
Obtain current uplink code rate；
According to the subscription information and the uplink code rate, determine video flowing to be sent resolution ratio and corresponding code rate；
According to fixed code rate, the video stream to be sent is given to the receiving end.
2. a kind of video flowing code rate allocation method as described in claim 1, which is characterized in that the receiving end includes several
A, then the resolution ratio of determination video flowing to be sent includes:
It determines several resolution ratio of video flowing to be sent and distributes to the code rate of the video flowing to be sent of each resolution ratio.
3. video flowing code rate allocation method as claimed in claim 2, which is characterized in that if determination video flowing to be sent
The code rate of dry resolution ratio and the video flowing to be sent for distributing to each resolution ratio specifically includes:
According to the subscription information and the uplink code rate, and based on lowest bit rate needed for the video flowing for sending each resolution ratio
Determining, target bit rate and highest code rate determine several resolution ratio of video flowing to be sent and distribute to the pending of each resolution ratio
Send the code rate of video flowing.
4. video flowing code rate allocation method as claimed in claim 3, which is characterized in that if determination video flowing to be sent
Dry resolution ratio specifically includes:
According to the demand of the resolution ratio of the video flowing of each receiving end subscription, and to meet several resolution ratio to be determined
The lowest bit rate of the video flowing to be sent is target, determines several resolution ratio that the uplink code rate can be supported as institute
State the resolution ratio of video flowing to be sent.
5. video flowing code rate allocation method as claimed in claim 4, which is characterized in that the determination uplink code rate institute energy
The resolution ratio enough supported includes: as the resolution ratio of the video flowing to be sent
According to sequence from low to high, each resolution ratio for subscribing to video flowing in the subscription information is successively chosen, and
For the resolution ratio of the subscription video flowing of each selection, judge that the lowest bit rate of the resolution ratio for the subscription video flowing chosen is
The no code rate no more than the uplink code rate current residual, if so, the resolution ratio of the selection to pull subscription is determined as
Subscription layer to be sent, if it is not, then meeting lowest bit rate in resolution ratio of the numerical value lower than the subscription video flowing resolution ratio chosen
Resolution ratio of the highest resolution of the code rate of the uplink code rate current residual as the video flowing to be sent.
6. video flowing code rate allocation method as claimed in claim 4, which is characterized in that it is described distribute to each resolution ratio to
The code rate for sending video flowing specifically includes:
To the video flowing distribution lowest bit rate to be sent of each resolution ratio；
It is described that the uplink code rate, which is obtained, to remaining code rate after the video flowing distribution lowest bit rate to be sent of each resolution ratio
First remaining code rate；
If the first remaining code rate is greater than zero, to meet the target bit rate of the video flowing to be sent as target, according to pre-
If sequence successively gives the described first remaining code rate to each video flowing distribution code rate to be sent；
The described first remaining code rate is obtained to meet residue after the target bit rate of the video flowing to be sent is allocated as target
Code rate be the second remaining code rate；
If the second remaining code rate is greater than zero, to meet the highest code rate of the video flowing to be sent as target, according to pre-
If the described second remaining code rate is successively given the video flowing distribution code rate to be sent of each resolution ratio by sequence.
7. video flowing code rate allocation method as claimed in claim 6, which is characterized in that the determination uplink code rate institute energy
The resolution ratio enough supported is minimum as the resolution ratio of the video flowing to be sent and to each resolution ratio distribution to be sent
Code rate includes:
S311, judge whether successively to choose each resolution in the subscription information according to the sequence of resolution ratio from low to high
Rate, if so, the S316 that gos to step, if it is not, then going to step S312；
S312, the sequence according to resolution ratio from low to high select next resolution for subscribing to video flowing from the subscription information
Rate is as current resolution；
S313, judge whether the current resolution has distributed lowest bit rate, if so, return step S311, if it is not, then going to
Step S314；
S314, judge whether the remaining code rate of the uplink code rate is not less than the lowest bit rate of the current resolution, if so,
Then determine that the current resolution is the resolution ratio of the video flowing to be sent, and it is corresponding most to distribute to the current resolution
Low bit- rate, while the remaining code rate of the uplink code rate is updated, and the S311 that gos to step；If it is not, then going to step S315；
S315, judgement support the next resolution ratio for being lower than the current resolution in the resolution ratio sent with the presence or absence of resolution ratio,
If so, the next layer of resolution ratio will be chosen as current resolution and execute step S313, if it is not, then going to step
S316；
S316, terminate resolution ratio that the determination uplink code rate can be supported as the resolution ratio to be sent, and
Lowest bit rate is distributed to the resolution ratio of each video flowing to be sent.
8. video flowing code rate allocation method as claimed in claim 6, which is characterized in that described to meet point to be sent
The target bit rate of resolution is target, is successively given the described first remaining code rate according to the sequence of resolution ratio from high to low each described
The resolution ratio of video flowing to be sent distributes code rate
S341, judge whether the video to be sent for successively choosing all determinations according to the sequence of resolution ratio from high to low
The resolution ratio of stream, if so, step S334 is gone to, if it is not, then going to step S342；
S342, the sequence according to resolution ratio from high to low choose from the resolution ratio of the video flowing to be sent of all determinations
Next current resolution ratio to be sent out；
S343, judge the described first code rate of remaining code rate current residual and being assigned to for the current resolution ratio to be sent
Lowest bit rate and whether be greater than the target bit rate of the current resolution ratio to be sent, if so, will first residue
Demal rate distributes to the current resolution ratio to be sent in the middle part of code rate, so that the code of the current resolution ratio distribution to be sent
Rate reaches target bit rate, updates the code rate of the described first remaining code rate current residual, and goes to step S341；If it is not, then by institute
The resolution ratio for being fully allocated to the current video flowing to be sent of the code rate of the first remaining code rate current residual is stated, described in update
The code rate of first remaining code rate current residual, and go to step S334；
S334, terminate the target bit rate to meet the resolution ratio of the video flowing to be sent as target, according to resolution ratio from
Described first remaining code rate is successively given each resolution ratio to be sent to distribute code rate by high to Low sequence.
9. video flowing code rate allocation method as claimed in claim 6, which is characterized in that described to meet the video to be sent
The highest code rate of the resolution ratio of stream is target, successively gives the described second remaining code rate often according to the sequence of resolution ratio from high to low
The resolution ratio of one video flowing to be sent distributes code rate
S361, judge whether the video to be sent for successively choosing all determinations according to the sequence of resolution ratio from high to low
The resolution ratio of stream, if so, step S364 is gone to, if it is not, then going to step S362；
S362, the sequence according to resolution ratio from high to low choose from the resolution ratio of determining all video flowings to be sent
The resolution ratio of next current video flowing to be sent out；
The resolution ratio of S363, the code rate for judging the described first remaining code rate current residual and the current video flowing to be sent are worked as
Before be assigned to code rate and whether be greater than the maximal rate of the current resolution ratio to be sent, if so, by described second
Demal rate distributes to the current resolution ratio to be sent in the middle part of remaining code rate, so that the resolution of the current video flowing to be sent
The code rate of rate distribution reaches maximal rate, updates the code rate of the described second remaining code rate current residual, and goes to step S361；If
It is no, then the code rate of the described second remaining code rate current residual is fully allocated to the current resolution ratio to be sent；
S364, terminate the highest code rate to meet the resolution ratio of the video flowing to be sent as target, according to resolution ratio from
Described second remaining code rate is successively given each resolution ratio to be sent to distribute code rate by high to Low sequence.
10. video flowing code rate allocation method as described in claim 1, which is characterized in that described receive is subscribed to from receiving end
Information includes:
Receive the subscription information for several receiving ends summarized and forwarded by server；
Then include: to the receiving end by the video stream to be sent
The video stream to be sent is given to the server, so that the server is by the video to be sent of each resolution ratio
Stream is sent to corresponding receiving end.
11. a kind of video flowing Data Rate Distribution device, which is characterized in that including processor, memory and be stored in the storage
In device and it is configured as the computer program executed by the processor, the processor is realized when executing the computer program
Video flowing code rate allocation method as described in any one of claims 1 to 10.
12. a kind of computer readable storage medium, which is characterized in that the computer readable storage medium includes the calculating of storage
Machine program, wherein equipment where controlling the computer readable storage medium in computer program operation is executed as weighed
Benefit require any one of 1 to 10 described in video flowing code rate allocation method.
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| PCT/CN2019/126713 WO2020143423A1 (en) | 2019-01-10 | 2019-12-19 | Video stream code rate allocation method and device and computer readable storage medium |
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